EFFECT OF SEED PRIMING ON RESERVE MOBILIZATION, WATER UPTAKE AND ANTIOXIDATIVE ENZYME ACTIVITIES IN GERMINATING SEEDS OF GROUNDNUT UNDER SALINITY STRESS

A. PAL¹*, S.K. YADAW², A.K. PAL³, S. GUNRI^4
1Department of Plant Physiology, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, 741252, West Bengal
²Department of Plant Physiology, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, 741252, West Bengal
³Department of Plant Physiology, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, 741252, West Bengal
⁴Department of Agronomy, Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, 741252, West Bengal
* Corresponding Author : apapurbapal@gmail.com

Received : 11-07-2017     Accepted : 16-07-2017     Published : 06-08-2017
Volume : 9     Issue : 36       Pages : 4542 - 4545
Int J Agr Sci 9.36 (2017):4542-4545

Keywords : Antioxidative enzyme, Groundnut, Reserve mobilization, Salinity stress, Seed priming
Academic Editor : Ashok Chhetri, Dr B N Motagi
Conflict of Interest : None declared
Acknowledgements/Funding : Author are thankful to Faculty of Agriculture, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, 741252, West Bengal
Author Contribution : All author equally contributed

An experiment was carried out to study the effect of seed priming on germination behavior, reserve mobilization, solute accumulation and antioxidative enzyme activities in germinating seeds of groundnut under salinity stress. Seeds of groundnut cv.TG-51 were treated with various priming agents viz., gibberellic acid 50 ppm, hydrogen peroxide 60 mM, ascorbic acid 100 ppm, salycilic acid 25 ppm, mannitol 2.5% and sodium chloride 50 mM for 14 hours and were subjected to salinity stress (200mM NaCl). Results indicated that the primed seeds showed significant improvement in germination speed and growth of embryonic axis over the unprimed ones under salinity treatment. This might be attributed to higher water uptake ability and enhanced rate of reserve mobilization because of seed priming before germination. The priming treatments also showed enhanced accumulation of proline along with higher activities of antioxidant enzymes GPOX and CAT and alleviated levels of lipid peroxidation in the embryonic axis which might contribute to osmotic regulation and mitigation of oxidative stress under salinity stress during seed germination. Among all the priming agents, GA3 50 ppm, mannitol 2.5% and NaCl 50mM especially produced encouraging results.

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